Brown the meats until crumbly (remove casing from Italian sausage).,Add the salt, pepper and spaghetti sauce.,Mix tomato sauce and tomato paste and combine thoroughly.,Bring to a boil, reduce heat and simmer 30 minutes.,Cook the macaroni according to the directions on the package; drain and combine with cooked sauce.,Spread 1/2 the meat mixture over the bottom of 2 1/2-quart casserole.,Top with 1/2 drained spinach.,Dot evenly with 1/2 the sour cream mixed with grated sharp Cheddar cheese.,Spread to make an even layer.,Sprinkle with 1/2 Parmesan cheese.,______